x = 10
local i = 1 -- local to the chunk
while i<=x do
  local x = i*2 -- local to the while body
  print(x) --> 2, 4, 6, 8, ...
  i = i + 1
end
if i > 20 then
  local x -- local to the "then" body
  x = 20
  print(x + 2)
else
  print(x) --> 10 (the global one)
end
print(x) --> 10 (the global one)
